dnl
dnl	$Id: c-attribute.m4 2 2004-06-30 15:40:21Z racarlson $
dnl

dnl
dnl	This macro is used to test for the gcc __attribute__ keyword.
dnl

AC_DEFUN(I2_C___ATTRIBUTE__, [
AC_MSG_CHECKING(for __attribute__)
AC_CACHE_VAL(ac_cv___attribute__, [
AC_TRY_COMPILE([
#include <stdlib.h>
],
[
static void foo(void) __attribute__ ((noreturn));

static void
foo(void)
{
  exit(1);
}
],
ac_cv___attribute__=yes,
ac_cv___attribute__=no)])
if test "$ac_cv___attribute__" = "yes"; then
  AC_DEFINE(HAVE___ATTRIBUTE__, 1, [define if your compiler has __attribute__])
fi
AC_MSG_RESULT($ac_cv___attribute__)
])
